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In humans, symptoms can include abdominal pain, diarrhea and weight loss. However, many infected individuals may be asymptomatic. Eurytrematosis is diagnosed through fecal examination for the presence of trematode eggs. Treatment typically involves the use of anthelmintic drugs such as praziquantel, which can effectively kill the adult parasites.
Some internal fish parasites are spectacular, such as the philometrid nematode Philometra fasciati which is parasitic in the ovary of female Blacktip grouper; [14] the adult female parasite is a red worm which can reach up to 40 centimetres in length, for a diameter of only 1.6 millimetre; the males are tiny.
Major groups of parasites include protozoans (organisms having only one cell) and parasitic worms (helminths). Of these, protozoans, including cryptosporidium, microsporidia, and isospora, are most common in HIV-infected persons. Each of these parasites can infect the digestive tract, and sometimes two or more can cause infection at the same time.
A large burden of adult worms in the intestines promotes symptoms such as nausea, heartburn, dyspepsia, and diarrhea from two to seven days after infection, while small worm burdens generally are asymptomatic. Eosinophilia presents early and increases rapidly. [13]
[2] [5] Opisthorchis viverrini damages the bile duct when in the adult stage of the life cycle, forming the cancer cholangiocarcinoma. [1] [5] Blood flukes can cause the trematodiases schistosomiasis which can cause reactions on skin. When infected, the host can also experience symptoms such as nausea, lack of appetite, diarrhoea, and abdominal ...
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The migration of adult worms in the intestinal epithelium can cause traumatic damage to the host tissue, and the waste products they excrete can provoke an immunological reaction. [2] The resulting inflammation can cause symptoms such as nausea, vomiting, sweating, and diarrhea.
Once in the host gut, Necator tends to cause a prolonged infection, generally 1 to 5 years (many worms die within a year or two of infection), though some adult worms have been recorded to live for 15 years or more. Ancylostoma adults are short-lived, surviving on average for only about 6 months. However, the infection can be prolonged because ...